Which gases are frequently found in water that encourage corrosion?

The presence of oxygen and carbon dioxide in water plays a significant role in promoting corrosion. Oxygen is a well-known oxidizing agent that can react with metals, leading to the formation of metal oxides. This process is especially relevant in the case of iron, which readily rusts when exposed to oxygen and moisture.

Carbon dioxide, on the other hand, can dissolve in water to form carbonic acid, which lowers the pH and increases the corrosive potential of water. This acidic environment can accelerate the deterioration of metallic surfaces in contact with water pipelines, tanks, and other structures.

Understanding the impact of these gases on water chemistry is crucial for managing corrosion and ensuring the longevity of water supply systems. In contrast, nitrogen and helium are inert gases and do not contribute to corrosion processes, while hydrogen and sulfur do not have the same widespread effect on corrosion in water as oxygen and carbon dioxide. Methane and phosphine are generally not involved in corrosion mechanisms associated with water supplies.